The Celestial Empire's conquest has left the galaxy without hope. Seven super-weapons — each the creation of an Imperial scientist — have reduced civilization after civilization to rubble. But Luru, one of those scientists, has had enough. She steals the designs for a planned eighth and ultimate super-weapon, hatches a plan to defect, and makes her run. The Imperial High Commander learns of her escape immediately and dispatches Luru's own brother, Lunoa, to bring her back. Piloting one of the seven super-weapons — the Rubel — Lunoa pursues her, but love clouds his pursuit long enough for Luru to activate an emergency warp. Her destination: Japan, 1945, just days after the end of the Second World War.